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All Journal LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat
Yeremias M. Pell
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Mechanical Engineering Public Health

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Analisis Kekuatan Tarik Komposit Hybrid Berpenguat Chip Daun Gewang Dan Serat Pendek E-Glass Jefri S. Bale; Yeremias M. Pell; Kristomus Boimau; Finsensius Lelu
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 7 No 01 (2020): April 2020
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/ljtmu.v7i01.3543

Abstract

The use of natural fiber as reinforcement for composite materials provides several advantages such as low density, biodegradable, easily recycled, inexpensive, good mechanical properties, and renewable because it comes from nature. One of the natural fibers that can be used as reinforcement for polymer composites is gewang leaves. This study aims to analyze the tensile strength of a hybrid composite with gewang leaf chip and E-glass short fiber reinforcement. The tensile strength of 61.25 Mpa and the stiffness modulus of 90.83 MPa produced by the E-glass fiber composite which is higher compared to the gewang leaf chip composite and the hybrid composite. The results showed that gewang leaf chip composite and the hybrid (gewang leaf chip + e-glass short fiber) can only be used for accessories applications such as car dashboards in the transportation industry that mechanical strength is not the prime factor.
Analisis Pengaruh Perlakuan Alkali Terhadap Wettability Serat Tunggal Widuri Dominggus Adoe; Yeremias M. Pell; Beni Sanak
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 8 No 02 (2021): Oktober 2021
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/ljtmu.v8i02.5942

Abstract

Along with its development, composites do not only use synthetic fibers, but there are already composite reinforcing materials made from natural fibers. The advantages of natural fiber as a reinforcing material for composite materials are: the ratio between strength and density is quite high, corrosion resistance, low cost and easy manufacturing process. The use of natural fibers as reinforcement for polymer materials provides opportunities for some natural fibers to be used as reinforcement for polymer composites, one of which is thistle fiber. The treatment used was alkaline treatment (NaOH) with percentages of 2%, 3%, 4%, 5%, 6%, and 7%, respectively, and the soaking time of 30, 60, 90, 120 minutes, and fiber. Widuri bark without treatment as a comparison. The purpose of this study was to determine the effect of the concentration of alkaline solution and the duration of immersion on the wettability of single widuri fibers. Single fiber testing refers to ASTM D3379 standard. From the results of the fiber contact angle test with 6% NaOH treatment for 120 minutes with a cos price of 0.906725322 with a droplet geometry that tends to be barrel. Meanwhile, fiber treated with 3% NaOH for 60 minutes had the lowest cos value of 0.472037963 with a droplet geometry that tends to be clam-shell
Edukasi dan Pelatihan Manajemen Bank Sampah kepada Warga Kelurahan Oesapa Barat dan Pengurus Bank Sampah Muara Abu Arifin Sanusi; Pius D. Ola; Yeremias M. Pell
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 9 No 1 (2026): Environmental-based Awareness for Agile Community Strength
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v9i1.613

Abstract

One of the impacts of population growth in a residential area is the problem of waste. If this problem is not immediately addressed, it will have a negative impact on residents around the settlement and the environment. This encourages collaboration from various parties, including universities and business actors of the Muara Abu Waste Bank to address this waste problem. This community service can be implemented by a team of lecturers from Nusa Cendana University with funding from the Ministry of Education, Science and Technology through BIMA. The objectives of this activity are first to provide education to residents of Oesapa Barat Village, especially around the Muara Abu coast, through waste bank management. The number of participants who attended this training was 50 residents, including waste bank customers. The second objective is to provide management training for the administrators of the Muara Abu Waste Bank (BSMA). The implementation of the activity consists of three stages: the preparation stage, the implementation stage, and the evaluation stage. The training material is the basics of waste bank management, including selection, sorting, packaging, and shipping. The following material introduces the management activities carried out during work, starting with customer deposits, sorting, weighing, storage, and bookkeeping of the waste bank account. For the waste bank administrators, the training focused on administrative systems and operational procedures. Educational activities also introduced creativity in recycled plastic waste products. The training, particularly for participants, resulted in increased knowledge of waste bank management. Before the training, only 38% of participants understood the material, whereas after the training this figure increased to 92%. Another impact was the rise in the number of BSMA customers, which grew from 39 to 68 by September 2025. This demonstrates the significant impact of this activity in raising public awareness of the benefits of waste banks.
Rancang Bangun Emergency Changer Station Di Pantai Panmuti Desa Noelbaki Theodorus De Rodath Kefi; Ishak S. Limbong; Yeremias M. Pell
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 01 (2025): April 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i01.20008

Abstract

This research focuses on the design and construction of a solar-based Emergency Charger Station at Panmuti Beach, Noelbaki Village, to meet the power needs of tourists who experience limited access to electricity. This system is designed with two monocrystalline solar panels with a maximum power of 50 WP connected in parallel, producing a total power of 100 W with a voltage of 17.2 V. The design includes measuring the intensity of solar radiation, calculating the power of the solar panels, the capacity of the Solar Charge Controller (SCC), and battery capacity. The battery with a total capacity of 36 Ah at 12 V allows daily energy storage of 800 Wh at an optimal sunlight intensity of 8 hours per day. Test results show that this system is effective in providing power to tourists' cellphones, although its efficiency is limited due to limited battery capacity. It is recommended to increase battery capacity and consider adding solar panels to increase the efficiency and sustainability of power supply at this tourist location.
The Effect The Effect of Fiber Orientation on the Compressive Strength of Palm Fruit Fiber Composite Beams Marsianus mario fredirikus hanmina; Yeremias M. Pell
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 02 (2025): Oktober 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i02.21556

Abstract

The demand for wood for construction continues to increase, while the supply of quality wood is decreasing. Therefore, a new alternative is needed to replace wood, one of which is by utilizing palm fruit fiber as a basic material for making composite wood as a new material to replace wood. This study uses an experimental testing method where the composite beams that have been molded by hand lay-up press with polyester resin reinforced with palm fruit fiber that has been treated with 5% alkali for 2 hours, and a fiber volume fraction of 35%. The variations in fiber orientation tested include parallel and perpendicular fibers. The compressive strength test specimens were made according to the ASTM D695-02a standard and tested using a compressive strength testing machine. The test results showed that the composite beam with parallel fibers had the highest average compressive strength and tension, namely 13,851.72 MPa and 42.94 MPa, while the perpendicular fiber orientation produced the lowest value. The highest strain was obtained in the composite with parallel fiber orientation, namely 0.16. While the highest modulus of elasticity was obtained in the composite beam with perpendicular fiber orientation, namely 432.38.
RANCANG BANGUN MESIN MIXER PUPUK ORGANIK Yosua Guntur silambi; Daud P. Mangesa; Yeremias M. Pell
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 02 (2025): Oktober 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i02.22881

Abstract

Organic fertilizers are fertilizers composed of living matter, such as weathering of animal and human plant residues. Organic fertilizers have more organic matter than nutrient content. Organic fertilizers have the advantage of being environmentally friendly, providing nutrients and macro elements for plants, functioning as soil dividers, improving soil structure, improving soil pore size which in turn makes water holding capacity and soil aeration better. Raw materials that can be used in making organic fertilizers include animal manure, rice husks, soil and charcoal. making organic fertilizer is a very heavy job and requires a long time to produce organic fertilizer until it is ready to use if done manually. This is what encourages research to increase the author's knowledge in the research “DRY ORGANIC PUPUK MIXER MACHINE DESIGN” in order to help make it easier to produce organic fertilizer in the next two decades
Co-Authors Arifin Sanusi Beni Sanak Daud P. Mangesa Dominggus Godlief Heryson Adoe Finsensius Lelu Ishak S. Limbong Jefri Semuel Bale Kristomus Boimau Marsianus mario fredirikus hanmina Pius Dore Ola Theodorus De Rodath Kefi Yosua Guntur silambi